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1 . 已知四棱锥S-ABCD的底面是正方形,
平面ABCD,求证:
![](https://img.xkw.com/dksih/QBM/2022/7/17/3024389976571904/3026770058690560/STEM/02c1d5499b6a4dbd974742f69f1e85f6.png?resizew=207)
(1)
平面SAC;
(2)若
,求点C到平面SBD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://img.xkw.com/dksih/QBM/2022/7/17/3024389976571904/3026770058690560/STEM/02c1d5499b6a4dbd974742f69f1e85f6.png?resizew=207)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/410f7a637b09213ab5481441b2f1082f.png)
您最近一年使用:0次
2022-07-20更新
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1321次组卷
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3卷引用:宁夏吴忠市吴忠中学2022-2023学年高二上学期期末考试数学(文)试题
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解题方法
2 . 如图,ABCD是边长为2的正方形,DE⊥平面ABCD,AF∥DE,DE=2AF=2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/a5429ba0-9d09-4483-8bd8-b64084b4b38e.png?resizew=173)
(1)证明:AC∥平面BEF;
(2)求点C到平面BEF的距离.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/a5429ba0-9d09-4483-8bd8-b64084b4b38e.png?resizew=173)
(1)证明:AC∥平面BEF;
(2)求点C到平面BEF的距离.
您最近一年使用:0次
2022-01-02更新
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674次组卷
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2卷引用:宁夏石嘴山市第一中学2021-2022学年高二上学期期末考试数学(理)试题